Using if statement inside a function,I didn't understand why the error is coming,why I am unable to use the values of x & y inside the if loop

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Raviteja Panamgipalli 2013-3-11

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https://ww2.mathworks.cn/matlabcentral/answers/66683-using-if-statement-inside-a-function-i-didn-t-understand-why-the-error-is-coming-why-i-am-unable-to

function O = help(~,~)
    i=input('Value of i:');
    j=input('Value of j:');
    O = y(i,j);
    function g=y(x,y)
        if(x==y)
        {
              k = rem(x,2);  
              s = log2( (y - k) );
              g = 2^(-s);
         } 
        else
        {
              g=0;
        }
        end 
        return; 
    end
    return;
end

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Walter Roberson 2013-3-11

There is no such thing as an "if loop". The body of an "if" is executed exactly once (or not at all), whereas a "loop" would continue executing the body until some condition was met.

Jan 2013-3-11

Please post the error message.

Be sure not to shadow the important Matlab function help by your function. This would be a very bad idea.

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采纳的回答

Vishal Rane 2013-3-11

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Curly braces for the if-else statement are not required.

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Jan 2013-3-11

As Vishal Rane has said already: remove the curly braces in the IF-block. They are not only not required, but even an error, because curly braces create a cell array.

Raviteja Panamgipalli 2013-3-11

Thank you,I forgot that matlab doesn't need curly braces for if else statement,confused with C programming,Anyway thankyou both for your suggestions Vishal & Walter Roberson

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